Do i HAVE to have an IV during birth?

I plan on doing an all natural birth. I see an OBGYN so I will be giving birth in a hospital.

I know its dumb my one of my biggest things I don't want is an IV. I'm terrified of needles, to the point where I tear up getting blood drawn and every time I have to get an IV I have a full blown out panic attack.

Is it required that I have an IV? Am I allowed to say no?

P.S. I don't need any negative or rude comments about the needle fear.